Socket for punches



(N0 Model.) 7

B.. WHIIE.V SOCKET PoR PUGHBS.

lPatented Nov. 23, 1886.

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noLLIN WHITE, or LOWELL, MASSACHUSETTS.

SOCKET Foa PUNCH es.

SPECIFICATION forming part of Letters Patent No. 353,189, dated November 23,1886.

i i v `Application tiled January 2, 1886. Serial No. 187,478 (No model.)

` Be itknown that I, ROLLIN WHITE, a citizen ofthe United States, residing at Lowell, in the county of Middlesex and Commonwealth of Massachusetts, have invented a certain new and useful Improvement in Sockets for Punches, of which the following is a Specication.

My invention relates to an improvement in punch-sockets, and is especially designed to be applied to punches for drawing cartridgeshells and similar articles drawn from metal.

In the accompanying drawings, Figure 1 represents a sectional elevation of my i1nproved punch-socket, a punch, a die, and a kpart of the dieholder, the middle portion of the punchand of the punch-socket being broken out, Fig. 2, an elevation of a part of the head of a machine in which and the nuts by which the punchsocket is held, a punch, the die, and a part of the die-holder, the die and holder being in section, and the lower part of the socket and the lower nuts being broken away to show the manner of holding thepunch.

In drawing cartridge-blanks and similar articles drawn from metal much diicultyis experienced in having the drawing-punches pass into the die exactlyin line with the axisof the die-opening, and'evcn where the punch is correctly set it is liable to be moved from the exact line of the die-opening. I remedy this defect by allowing the punch to automatically adjust itself by a peculiarlyconstructed punch-socket. I secure in the head B of a machine, which is caused in practice to have a reciprocating motion, a holder or sleeve, L, by means of nuts Z and check-nuts Z, which turn on the screwthreaded'end portions of said sleeve above and below the head. Thisholderis laterally adjusted to bringit andthe punch carried by it directly over thedie-opening which corresponds to it, and as near as possible in line with the axis of the die. In the lower end of said holder L is a cylindrical opening, Zt, into which openingv is screwed a hollow cylindrical plug, L.

The plug L is provided in its upper end with a hemispherical cavity, in which rests a ball,fL, and the sleeve above said cylindrical opening Z4 is chambered out to iit the upper portion of said ball. The ball Lhas a down- The upper side of the 'block L* is preferably provided with a projecting teat, Z7, which is surrounded by aspiral spring, Z9,which presses upon the block Lt. A screw, L5, turning vertically in a screw-threaded hole in the top of the holder L, compresses the spring Z9 between it and the top of the block L, and allows the punch to yield vertically, and thereby adjust itself laterally to the die.

The screw L5 is preferably provided with a check-nut, L". adjusted in its seat, it may be limited in its lateral motion bythe screws l, which turn radially in the plug L against the shank of the punch, the opening in said plug being greater than the shank of the punch. The screws l aid in bringing the punch in line with the axis of the die, but should not press upon the shank with sucient force to prevent the free vertical movement of the punch.

It will be seen that in operation, as the punch enters the die-opening, the resistance oered by the blank in the die will tend to raise the enlarged portion of the punch or conical plug L3 from its seat in the ball L, and the punch is then at liberty to move laterally to adjust itself to the die, in which position it may be secured bythe screws l, or may be allowed to move freely. The resistance necessary to raise the punch from its seat is regulated by the spring Z9 being more or less compressed between the block L4 and the screw L5.

In many cases it is advantageous to make the conical plug L3 and the punch in one piece, thus making it apunch with an enlarged head, the action being the same in either form.

Should the screws Z12 be turned up, so as to press upon the shank ofthe punch from all sides, it will be seen that when the punch is raised from its seat, as above described, it will move as if pivoted at the point at which the screws press, and move to Vadjust itself to the opening of the die.

I claim as my inventionl. The combination of a holder having at its When the punch is properly i IOO lower end a chamber, a cylindrical plug secured in said chamber, said plug having a central opening and a hemispherical cavity in its top, a ball having a central conical opening, a punch having a conical head adapted to be received into said conical opening, and a punch, substantially as described.

2. The combination of a holder having at its lower end a chamber, a cylindrical plug secured in said chamber, said plug having a central opening and a hemspherical cavity in its top, a ball having a conical central-open-V ing, a punch having a conical head adapted to Alower end a chamber, a cylindrical plug secured in said chamber, said plug having a central opening and a heinispherical cavity in its top, a ball having a central conical opening, a punch having a conical head adapted to be received into said conical opening,- a punch, a

said holder and adapted to` compress said spring between said screw and the upper end .of the conical head of said punch, substanspring, and a screw passing through the top of 25 and having a central vertical opening and in the top a hemispherical cavity, a ball having a central conical opening, a conical plug adapted to ill said conical opening, and having a central orifice to receive the upper end of a punch, and a punch,'substantially as shown and described.

ROLLIN WHITE.

Witnesses:

HERBERT R. WHITE, ALBERT M. MOORE. 

